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AS5130

Data Sheet - A p p l i c a t i o n s

Contents

1 General Description..............................................................................................................................

1

2 Key Features ........................................................................................................................................

1

3 Applications ..........................................................................................................................................

1

4 Pin Assignments...................................................................................................................................

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Pin Descriptions ...................................................................................................................................................

4

5 Absolute Maximum Ratings..................................................................................................................

5

6 Electrical Characteristics ......................................................................................................................

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Timing Characteristics ..........................................................................................................................................

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Magnetic Input Range ..........................................................................................................................................

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7 Detailed Description ...........................................................................................................................

10

Connecting the AS5130 .....................................................................................................................................

10

Serial 3-Wire Connection (Default Setting) .................................................................................................... 10

Serial 3-Wire Connection (OTP Programming Option) .................................................................................. 12

1-Wire PWM Connection................................................................................................................................ 12

Analog Output ................................................................................................................................................ 13

Analog Sin/Cos Outputs with External Interpolator ........................................................................................ 14

Serial Synchronous Interface (SSI) ....................................................................................................................

15

Commands of the SSI in Normal Mode.......................................................................................................... 15

Commands of the SSI in Extended Mode ...................................................................................................... 16

Multi Turn Counter..............................................................................................................................................

19

AS5130 Status Indicators ...................................................................................................................................

19

Lock Status Bit ............................................................................................................................................... 19

Magnetic Field Strength Indicators................................................................................................................. 20

“Pushbutton” Feature .........................................................................................................................................

20

High Speed Operation ........................................................................................................................................

21

Propagation Delay.......................................................................................................................................... 21

Sampling Rate................................................................................................................................................ 21

Chip Internal Lowpass Filtering...................................................................................................................... 21

Digital Readout Rate ...................................................................................................................................... 22

Total Propagation Delay of the AS5130......................................................................................................... 22

Reduced Power Modes ......................................................................................................................................

22

Low Power Mode ........................................................................................................................................... 22

Power Cycling Mode ...................................................................................................................................... 23

Polling Mode .................................................................................................................................................. 24

8 Application Information .......................................................................................................................

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Benefits of AS5130............................................................................................................................................

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Application Example 1........................................................................................................................................

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Application Example II 3-wire sensor with magnetic field strength indication.....................................................

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Application Example III: Low-power encoder .....................................................................................................

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Application Example IV: Polling mode................................................................................................................

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Accuracy of the Encoder system........................................................................................................................

29

Quantization Error .......................................................................................................................................... 29

Vertical Distance of the Magnet ..................................................................................................................... 31

Choosing the Proper Magnet ......................................................................................................................... 31

Magnet Placement ......................................................................................................................................... 32